Low inductance inverter
First Claim
1. An inverter circuit comprising:
- (a) a printed circuit board means having a surface;
(b) first and second voltage rails positioned parallel to each other and above said printed circuit board surface, wherein said surface includes a first portion extending from said first voltage rail and a second portion extending from said second voltage rail;
(c) a plurality of switching pairs, each including a first switching circuit having semiconductor circuit components including a first diode and a first transistor, and a second switching circuit having semiconductor circuit components including a second diode and a second transistor, said first switching circuit positioned on said first portion of said printed circuit board surface, and said second switching circuit positioned on said second portion of said printed circuit board surface, and each said switching pair further including(i) a plurality of conductive circuit traces on said printed circuit board;
(ii) a plurality of bonding wires for interconnecting said semiconductor circuit components with said traces and said voltage rails;
wherein said wires and said traces are a plurality of conductors, including a first quantity of one or more said conductors carrying a current in a first direction during operation of said inverter, and a second quantity of one or more said conductors carrying a current in a second direction opposite to said first direction during operation of said inverter, and said first quantity and said second quantity are positioned so as to electrically couple,whereby inductances associated with said first quantity and said second quantity are reduced.
6 Assignments
0 Petitions
Accused Products
Abstract
A physical construction of an inverter of the type having a positive voltage line and a negative voltage line interconnected by one or more switch sections. Each section includes two switch circuits, each having a transistor in parallel with a diode. The two switch circuits are connected in series, with the connection between the circuits providing an output to drive a load. The positive voltage line includes a positive voltage rail positioned closely to a negative voltage rail which is part of the negative voltage line. The close proximity of the two rails causes an electrical coupling between the positive and negative voltage lines. Current paths including circuit traces and bond wires within the inverter are arranged to place paths having oppositely directed currents, or equal and opposite di/dt'"'"'s, in close parallel proximity resulting in mutual coupling and reduction in parasitic inductances. This construction results in a substantial reduction in the inductances of the various lines, with a corresponding reduction in switching voltage peaks, and an increased power and operational frequency capability.
-
Citations
7 Claims
-
1. An inverter circuit comprising:
-
(a) a printed circuit board means having a surface; (b) first and second voltage rails positioned parallel to each other and above said printed circuit board surface, wherein said surface includes a first portion extending from said first voltage rail and a second portion extending from said second voltage rail; (c) a plurality of switching pairs, each including a first switching circuit having semiconductor circuit components including a first diode and a first transistor, and a second switching circuit having semiconductor circuit components including a second diode and a second transistor, said first switching circuit positioned on said first portion of said printed circuit board surface, and said second switching circuit positioned on said second portion of said printed circuit board surface, and each said switching pair further including (i) a plurality of conductive circuit traces on said printed circuit board; (ii) a plurality of bonding wires for interconnecting said semiconductor circuit components with said traces and said voltage rails; wherein said wires and said traces are a plurality of conductors, including a first quantity of one or more said conductors carrying a current in a first direction during operation of said inverter, and a second quantity of one or more said conductors carrying a current in a second direction opposite to said first direction during operation of said inverter, and said first quantity and said second quantity are positioned so as to electrically couple, whereby inductances associated with said first quantity and said second quantity are reduced. - View Dependent Claims (2, 3, 4)
-
-
5. An inverter circuit comprising:
-
(a) a printed circuit board means having a surface; (b) first and second voltage rails positioned parallel to each other and above said printed circuit board surface, wherein said surface includes a first portion extending from said first voltage rail and a second portion extending from said second voltage rail; (c) a plurality of switching pairs, each including a first switching circuit having semiconductor circuit components including a first diode and a first transistor, and a second switching circuit having semiconductor circuit components including a second diode and a second transistor, said first switching circuit positioned on said first portion of said printed circuit board surface, and said second switching circuit positioned on said second portion of said printed circuit board surface, and each said switching pair further including (i) a plurality of conductive circuit traces on said printed circuit board; (ii) a plurality of bonding wires for interconnecting said semiconductor circuit components with said traces and said voltage rails; wherein said wires and said traces are a plurality of conductors, including a first quantity of one or more said conductors carrying a current that changes in magnitude in a first direction during operation of said inverter, and a second quantity of one or more said conductors carrying a current that changes in magnitude in a second direction opposite to said first direction during operation of said inverter, and said first quantity and said second quantity are positioned so as to electrically couple, whereby inductances associated with said first quantity and said second quantity are reduced. - View Dependent Claims (6, 7)
-
Specification